/**
 * Copyright (c) 2008, EffCode, www.effcode.com
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice, this list 
 * of conditions and the following disclaimer. 
 * Redistributions in binary form must reproduce the above copyright notice, this list 
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution. 
 * Neither the name of the EffCode nor the names of its contributors may be used 
 * to endorse or promote products derived from this software without specific prior written 
 * permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.effdom.impl;

import java.io.Serializable;

import org.effdom.Attr;
import org.effdom.Document;
import org.effdom.Element;
import org.effdom.io.impl.DocParserImpl;

/**
 * @author <a href="mailto:mattias@effcode.com">Mattias Jonsson</a>
 */
public abstract class AttrBase extends NodeBase implements Attr, Serializable {

    protected static final long serialVersionUID = -9163779469152023743L;

    protected int length;

    protected int idSize;

    protected int lenSize;

    public AttrBase(Document document, Element parent, short id) {
        super(document, parent, id);
        idSize = DocParserImpl.ID_LENGTH;
        if (id > Byte.MAX_VALUE || id < Byte.MIN_VALUE) {
            idSize = DocParserImpl.ID_LENGTH_L;
        }
    }

    public abstract String value() throws IllegalStateException;
    
    public byte[] valueAsByteArray() throws IllegalStateException {
        throw new IllegalStateException("Invalid data format");
    }

    public int valueAsInt() throws IllegalStateException {
        throw new IllegalStateException("Invalid data format");
    }
    
    public long valueAsLong() throws IllegalStateException {
        throw new IllegalStateException("Invalid data format");
    }

    protected void setLengthSize(int length) {
        lenSize = DocParserImpl.SIZE_LENGTH;
        if (length > Byte.MAX_VALUE) {
            lenSize = DocParserImpl.SIZE_LENGTH_L;
        }
    }

    public void addLength(Counter counter) {
        counter.addLength(DocParserImpl.ATTR_HEADER_SIZE + idSize + lenSize + length());
    }

    public int length() {
        return length;
    }
    
    public String toString() {
        String result = String.valueOf(id()) + "=\"";
        try {
            result += value();
        } catch (IllegalStateException e) {
            result += "No valid attribute value";
        }
        return result + "\"";
    }
}
